gitea: fix healthcheck — probe /api/healthz (was 404 on /api/v1/version pre-install)

Surfaced during the unattended deploy sweep: a fresh gitea reported unhealthy because
the HC hit /api/v1/version (404 until install-lock); /api/healthz returns 200 while
serving. Fixed both the docker HC and the controller .felhom.yml probe; bumped
start_period to 90s for first-boot DB migration. Same class as the komga fix.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

templates/gitea/docker-compose.yml

@@ -24,12 +24,15 @@ services:
       resources:
         limits:
           memory: 512M
+    # /api/healthz is gitea's dedicated health endpoint (200 once serving); /api/v1/version returns
+    # 404 until the install wizard is completed (INSTALL_LOCK), so it falsely reported unhealthy on a
+    # fresh deploy. The gitea image ships curl (verified). 90s start_period covers first-boot DB migration.
     healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:3000/api/v1/version"]
+      test: ["CMD", "curl", "-f", "http://localhost:3000/api/healthz"]
       interval: 30s
       timeout: 5s
       retries: 3
-      start_period: 30s
+      start_period: 90s
     labels:
       - "traefik.enable=true"
       - "traefik.http.routers.gitea.rule=Host(`${SUBDOMAIN}.${DOMAIN}`)"